- #1
anemone
Gold Member
MHB
POTW Director
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Hi members of the forum,
I am unable to determine the value of \(\displaystyle a_{1000}\) in the problem as stated below because I think I failed to observe another useful pattern of the given sequence.
Could anyone please help me out with this problem? Thanks in advance.
Problem:
A sequence \(\displaystyle a_1\), \(\displaystyle a_2\), \(\displaystyle a_3,\;\cdots\) of positive integers satisfies the following properties:
\(\displaystyle a_1=1\)
\(\displaystyle a_{3n+1}=2a_n+1\)
\(\displaystyle a_{n+1}\ge a_n\)
\(\displaystyle a_{2001}=200\)
Find the value of \(\displaystyle a_{1000}\)
I am unable to determine the value of \(\displaystyle a_{1000}\) in the problem as stated below because I think I failed to observe another useful pattern of the given sequence.
Could anyone please help me out with this problem? Thanks in advance.
Problem:
A sequence \(\displaystyle a_1\), \(\displaystyle a_2\), \(\displaystyle a_3,\;\cdots\) of positive integers satisfies the following properties:
\(\displaystyle a_1=1\)
\(\displaystyle a_{3n+1}=2a_n+1\)
\(\displaystyle a_{n+1}\ge a_n\)
\(\displaystyle a_{2001}=200\)
Find the value of \(\displaystyle a_{1000}\)